单项选择题
Which of the following is the BEST way to deny unauthorized computers access to a network? （）
A. Disable DHCP.
B. Use MAC filtering.
C. Disable the SSID broadcast.
D. Use a network firewall.
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A. The computers BIOS is corrupt.
B. The computers operating system needs to be updated.
C. The computers CMOS battery has lost its charge.
D. The computers power supply is failing. -
单项选择题
Which of the following could cause an Inaccessible boot drive error during the boot process? （）
A. HDD failure
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After removing several obsolete programs from a PC, a user is experiencing slower than usuallyprocessing times. Which of the following would be the BEST way to speed up the processing? （）
A. Use an external hard drive.
B. Defrag the hard drive.
C. Add more RAM to the computer.
D. Install a larger hard drive.
